For example,side sleepers tested pillows advertised as supportive to keep the neck and spine aligned, hot sleepers tested cooling pillows, and plush-preferring sleepers tried pillows made of materials like latex or down. Every selection from this list has either been tested by an AD editor for our best pillows roundup or was recommended by doctors in our best pillows for side sleepers story. When testing pillows, we considered what type of sleeping position our writers favored and what drew them to this pillow.